import { Injectable } from '@angular/core';
import { ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot, UrlTree } from '@angular/router';
import { Observable } from 'rxjs';
import { AuthService } from './auth.service';

@Injectable({
    providedIn: 'root'
})
export class AuthGuard implements CanActivate {

    constructor(
        private router: Router,
        private authService: AuthService
    ) {
    }

    canActivate(
        next: ActivatedRouteSnapshot,
        state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
        if (!this.authService.isLoggedIn) {
            return this.router.parseUrl('/');
        }
        return true;
    }

}
